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Möller K, Ntovas S, Hocke M, On W, Everett SM, Braden B, Jenssen C, Misselwitz B, Ge N, Sun S, Gerber M, Faiss S, Dietrich CF. Comments and illustrations of the European Federation of Societies for Ultrasound in Medicine guidelines: Rare pancreatic tumors, ultrasound and contrast-enhanced ultrasound features-Malignant mesenchymal tumors. Endosc Ultrasound 2024; 13:55-64. [PMID: 38947746 PMCID: PMC11213603 DOI: 10.1097/eus.0000000000000054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/02/2024] Open
Abstract
Rare malignant mesenchymal pancreatic tumors are systematized and reported in this review. The focus is on the appearance on imaging. The present overview summarizes the data and shows that not every pancreatic tumor corresponds to the most common entities of ductal adenocarcinoma or neuroendocrine tumor.
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Affiliation(s)
- Kathleen Möller
- Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
| | - Sotirios Ntovas
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Michael Hocke
- Medical Department II, Helios Klinikum Meiningen, Germany
| | - Wei On
- Department of Gastroenterology, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - Simon M. Everett
- Department of Gastroenterology, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - Barbara Braden
- Translational Gastroenterology Unit, Oxford University Hospitals, Oxford, United Kingdom
| | - Christian Jenssen
- Department of Internal Medicine, Krankenhaus Märkisch-Oderland, Strausberg, Germany
- Brandenburg Institute for Clinical Ultrasound (BICUS) at Medical University Brandenburg, Neuruppin, Germany
| | - Benjamin Misselwitz
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Nan Ge
- Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
| | - Siyu Sun
- Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
| | - Michael Gerber
- Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
| | - Siegbert Faiss
- Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
| | - Christoph F. Dietrich
- Department Allgemeine Innere Medizin der Kliniken (DAIM) Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland
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Wang WW, Zhou SP, Wu X, Wang LL, Ruan Y, Lu J, Li HL, Ni XL, Qiu LL, Zhou XH. Imaging, pathology, and diagnosis of solitary fibrous tumor of the pancreas: A case report and review of literature. World J Clin Cases 2024; 12:995-1003. [PMID: 38414609 PMCID: PMC10895636 DOI: 10.12998/wjcc.v12.i5.995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/01/2023] [Accepted: 01/18/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND A solitary fibrous tumor (SFT) is often located in the pleura, while SFT of the pancreas is extremely rare. Here, we report a case of SFT of the pancreas and discuss imaging, histopathology, and immunohistochemistry for accurate diagnosis and treatment. CASE SUMMARY A 54-year-old man presented to our hospital with pancreatic occupancy for over a month. There were no previous complaints of discomfort. His blood pressure was normal. Blood glucose, tumor markers, and enhanced computed tomography (CT) suggested a malignant tumor. Because the CT appearance of pancreatic cancer varies, we could not confirm the diagnosis; therefore, we performed endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB). Pathology and immunohistochemistry were consistent with SFT of the pancreas. The postoperative pathology and immunohistochemistry were consistent with the puncture results. The patient presented for a follow-up examination one month after discharge with no adverse effects. CONCLUSION Other diseases must be excluded in patients with a pancreatic mass that cannot be diagnosed. CT and pathological histology have diagnostic value for pancreatic tumors. Endoscopic puncture biopsy under ultrasound can help diagnose pancreatic masses that cannot be diagnosed preoperatively. Surgery is an effective treatment for SFT of the pancreas; however, long-term follow-up is strongly recommended because of the possibility of malignant transformation of the tumor.
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Affiliation(s)
- Wen-Wen Wang
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
| | - Shu-Ping Zhou
- Ningbo College of Health Sciences, Ningbo College of Health Sciences, Ningbo 315000, Zhejiang Province, China
| | - Xiang Wu
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
- Health Science Center, Ningbo University, Ningbo 315000, Zhejiang Province, China
| | - Luo-Luo Wang
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
| | - Yi Ruan
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
| | - Jun Lu
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, Zhejiang Province, China
| | - Hai-Li Li
- Department of Diagnosis, Ningbo Diagnostic Pathology Center, Ningbo 315000, Zhejiang Province, China
| | - Xu-Ling Ni
- Department of Diagnosis, Ningbo Diagnostic Pathology Center, Ningbo 315000, Zhejiang Province, China
| | - Li-Li Qiu
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
| | - Xin-Hua Zhou
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Li Huili Hospital, Ningbo University School of Medicine, Ningbo 315000, Zhejiang Province, China
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Yi K, Lee J, Kim DU. Metastatic pancreatic solitary fibrous tumor: A case report. World J Clin Cases 2023; 11:8416-8424. [PMID: 38130626 PMCID: PMC10731191 DOI: 10.12998/wjcc.v11.i35.8416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/27/2023] [Accepted: 12/04/2023] [Indexed: 12/14/2023] Open
Abstract
BACKGROUND Solitary fibrous tumor (SFT) is a rare mesenchymal tumor that is most commonly found in the pleura but can also originate from non-pleural sites. Among the non-pleural localizations, the pancreas is extremely rare. In particular, metastasis to the pancreas from the central nervous system (CNS) is extremely rare, with only two cases reported so far. We report a case of recurrence in the pancreas 14 years after the initial complete surgical removal of a tumor in the CNS. CASE SUMMARY A 68-year-old man with a past medical history of recurrent meningeal hemangiopericytoma, currently referred to as SFT, presented to the hospital with jaundice. The patient was first diagnosed with an 8cm-sized meningeal hemangiopericytoma fourteen years ago and underwent osteoplastic craniotomy. After 16 mo, imaging showed recurrence and he underwent gamma knife radiosurgery (GKRS). 2 years later, imaging showed recurrence again leading to a second GKRS. 5 years later, recurrence was again suspected leading to a second craniotomy. Since then 3 years had passed, and imaging showed a 3.5cm-sized mass lesion on the pancreatic head with obstruction of the pancreatic and bile ducts. Endosonography with fine-needle aspiration biopsy was done preoperatively and aided in the diagnosis of SFT. The patient underwent pylorus-preserving pancreaticoduodenectomy. Pathologic findings of the resected pancreatic specimen, consistent with the previously resected brain specimen, confirmed the diagnosis of SFT. CONCLUSION The rarity and lack of knowledge about SFTs make suspecting and diagnosing this disease challenging. We believe that a report of metastatic pancreatic SFT from the CNS will contribute to a better understanding of this rare disease.
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Affiliation(s)
- Kiyoun Yi
- Division of Gastroenterology, Department of Internal Medicine, Pusan National University Hospital, Busan 49241, South Korea
| | - Jonghyun Lee
- Division of Gastroenterology, Department of Internal Medicine, Pusan National University Hospital, Busan 49241, South Korea
| | - Dong Uk Kim
- Division of Gastroenterology, Department of Internal Medicine, Pusan National University Hospital, Busan 49241, South Korea
- Biomedical Research Institute, Pusan National University Hospital, Busan 49241, South Korea
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Janik AM, Terlecka A, Spałek MJ, Boye K, Szostakowski B, Chmiel P, Szumera-Ciećkiewicz A, Bobak K, Świtaj T, Rutkowski P, Czarnecka AM. Diagnostics and Treatment of Extrameningeal Solitary Fibrous Tumors. Cancers (Basel) 2023; 15:5854. [PMID: 38136399 PMCID: PMC10742263 DOI: 10.3390/cancers15245854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 12/24/2023] Open
Abstract
Solitary fibrous tumors (SFT) are rare mesenchymal neoplasms that account for less than 2% of all soft tissue masses. In the latest WHO 2020 Classification of Soft Tissue Tumors, extrameningeal SFT was listed as intermediate (rarely metastasizing) or malignant neoplasms. Due to the lack of characteristic clinical features, their diagnosis and treatment remain challenging. The pathogenesis of SFT is often associated with the presence of fusions of the NAB2-STAT6 gene on the 12q13 chromosome. Cytoplasmic CD34 positive staining is considerably characteristic for most SFTs; less frequently, factor XII, vimentin, bcl-2, and CD99 are present. A key factor in the diagnosis is the prevalent nuclear location of STAT6 expression. Radical resection is the mainstay of localized SFTs. In the case of unresectable disease, only radiotherapy or radio-chemotherapy may significantly ensure long-term local control of primary and metastatic lesions. To date, no practical guidelines have been published for the treatment of advanced or metastatic disease. Classical anthracycline-based chemotherapy is applicable. The latest studies suggest that antiangiogenic therapies should be considered after first-line treatment. Other drugs, such as imatinib, figitumumab, axitinib, and eribulin, are also being tested. Definitive radiotherapy appears to be a promising therapeutic modality. Since standards for the treatment of advanced and metastatic diseases are not available, further investigation of novel agents is necessary.
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Affiliation(s)
- Anna Maria Janik
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Anna Terlecka
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Mateusz J. Spałek
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
- Department of Radiotherapy I, Maria Sklodowska-Curie National Research Institute of Oncology, 02-718 Warsaw, Poland
| | - Kjetil Boye
- Department of Oncology, Oslo University Hospital, 0372 Oslo, Norway;
| | - Bartłomiej Szostakowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
| | - Paulina Chmiel
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
| | - Anna Szumera-Ciećkiewicz
- Department of Pathology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland;
- Diagnostic Hematology Department, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland
| | - Klaudia Bobak
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
| | - Tomasz Świtaj
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
| | - Piotr Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
| | - Anna M. Czarnecka
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (A.M.J.); (A.T.); (M.J.S.); (B.S.); (P.C.); (K.B.); (T.Ś.); (P.R.)
- Department of Experimental Pharmacology, Mossakowski Medical Research Institute Polish Academy of Sciences, 02-106 Warsaw, Poland
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Tanigawa M, Koga Y, Naito Y, Yamaguchi H, Iwasaki T, Kohashi K, Ohike N, Hanada K, Higashi M, Komatsu M, Imai H, Yamakita K, Nagakawa T, Okabe Y, Kato S, Noguchi H, Nakayama T, Yasuda M, Kusano H, Akiba J, Oda Y, Yano H. Pancreatic hamartoma: detection of harbouring NAB2-STAT6 fusion gene. Histopathology 2022; 81:319-328. [PMID: 35758200 DOI: 10.1111/his.14703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 06/13/2022] [Accepted: 06/16/2022] [Indexed: 11/30/2022]
Abstract
AIM Hamartomas in the pancreas are rare and are often histologically and morphologically similar to solitary fibrous tumours (SFTs). We examined the differences between hamartomas and SFTs at the molecular level. METHODS AND RESULTS Thirteen patients histopathologically diagnosed with pancreatic hamartoma were included in the study. We also performed STAT6 immunohistochemistry (IHC), which is used in the diagnosis of SFT. Furthermore, for the three cases in which RNA was extracted, reverse transcription polymerase chain reaction to search for NAB2-STAT6 fusions was used. Macroscopically, 13 patients had well-demarcated tumour lesions. Histologically, no islets of Langerhans were observed in the lesions, acinar tissue and ducts were unevenly distributed, and elastic fibres were not observed around the ducts by Elastica Van Gieson staining. One case contained a lipomatous hamartoma composed mainly of adipose tissue. Seven of the 13 cases demonstrated expression of STAT6 in the nuclei of intervening spindle cells. NAB2-STAT6 fusions were observed in two of the three cases in which RNA was extracted. These two cases also demonstrated STAT6 expression in spindle cells using STAT6 IHC. In one case of lipomatous hamartoma, we did not confirm NAB2-STAT6 fusion or STAT6 expression in STAT6 IHC. CONCLUSION Of the 13 patients histopathologically diagnosed with hamartoma, two demonstrated NAB2-STAT6 fusions, suggesting the existence of pancreatic hamartomas with molecular-level components identical to those of SFT.
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Affiliation(s)
- Masahiko Tanigawa
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - Yutaka Koga
- Department of Pathology, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
| | - Yoshiki Naito
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan.,Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | | | - Takeshi Iwasaki
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kenichi Kohashi
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Nobuyuki Ohike
- Division of Pathology, Shizuoka, Cancer Center, Shizuoka, Japan
| | - Keiji Hanada
- Department of Gastroenterology, Onomichi General Hospital, Hiroshima, Japan
| | - Michiyo Higashi
- Department of Pathology, Field of Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Masato Komatsu
- Department of Diagnostic Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroshi Imai
- Pathology Division, Mie University Hospital, Tsu, Japan
| | - Keisuke Yamakita
- Division of Metabolism and Biosystemic Science, Gastroenterology, and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan
| | - Tatsuya Nagakawa
- Department of Gastroenterology, Sapporo-Kosei General Hospital, Sapporo, Japan
| | - Yoshinobu Okabe
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Seiya Kato
- Division of Pathology, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Hirotsugu Noguchi
- Department of Pathology, Field of Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Toshiyuki Nakayama
- Department of Pathology, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Masanori Yasuda
- Department of Pathology, Saitama Medical University International Medical Center, Hidaka, Japan
| | - Hironori Kusano
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - Jun Akiba
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hirohisa Yano
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
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6
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Mizukoshi K, Yamauchi Y, Kitaura M, Fukuda A, Seno H. Rare hypervascular pancreatic tumors diagnosed as asynchronous metastases of central nervous system solitary fibrous tumor/hemangiopericytoma. Clin J Gastroenterol 2021; 15:221-227. [PMID: 34652718 DOI: 10.1007/s12328-021-01533-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 10/07/2021] [Indexed: 11/28/2022]
Abstract
A 70-year-old woman was referred to our hospital for asymptomatic pancreatic tumors. She had a history of hemagiopericytoma (HPC) about 20 years ago, and no apparent recurrence has been observed. Contrast-enhanced computed tomography revealed two hypervascular tumors in the head and uncinate process of the pancreas, and no obvious neoplastic lesions were found in other organs. Endoscopic ultrasound guided fine-needle aspiration cytology was performed and histopathology showed that spindle-shaped tumor cells were arranged in a hemangiopericytoma-like pattern and positive for STAT6, which was a characteristic feature of solitary fibrous tumors (SFTs). Immunohistochemical staining for surgical pathology specimens from past HPC showed positive expression of STAT6, which was Grade 2 central nervous system solitary fibrous tumor/hemagiopericytoma (CNS SFT/HPC) according to the current WHO classification. From these findings, the pancreatic tumors were preoperatively diagnosed as pancreatic metastases of CNS SFT/HPC. She underwent pancreaticoduodenectomy. Histopathological examination of the surgically resected specimen proved that the both pancreatic tumors were SFT/HPC. Thus, pancreatic tumors were finally diagnosed as asynchronous pancreatic metastases from CNS SFT/HPC. Although extremely rare, metastatic pancreatic tumors derived from SFT/HPC should be considered as a differential diagnosis for hypervascular pancreatic tumors, especially when having a past history of brain tumors.
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Affiliation(s)
- Kenta Mizukoshi
- Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Yuki Yamauchi
- Department of Gastroenterology, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77, Higashinamba-cho, Amagasaki, Hyogo, 660-8550, Japan
| | - Mami Kitaura
- Department of Gastroenterology, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77, Higashinamba-cho, Amagasaki, Hyogo, 660-8550, Japan
| | - Akihisa Fukuda
- Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hiroshi Seno
- Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
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Jones VM, Wangsiricharoen S, Cornea V, Bocklage TJ, Ali SZ, Allison DB. Cytopathological characteristics of solitary fibrous tumour involving the pancreas by fine needle aspiration: Making an accurate preoperative diagnosis in an uncommon location. Cytopathology 2021; 33:222-229. [PMID: 34551176 DOI: 10.1111/cyt.13061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/05/2021] [Accepted: 09/18/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND Solitary fibrous tumour (SFT) is a unique mesenchymal neoplasm with classic features on histology and is characterised by the NAB2-STAT6 gene fusion. There are rare reports of SFTs with pancreatic involvement and only two cases in the literature reporting its features by preoperative fine needle aspiration (FNA). Herein, we characterise the cytomorphological features of four SFTs involving the pancreas by FNA to establish a preoperative diagnostic approach. METHODS The anatomic pathology archives of two academic medical centres were searched to identify patients with a pancreatic FNA cytology specimen and a confirmed diagnosis of SFT by surgical resection. The clinical history, pathological diagnosis, cytomorphological findings, and results of immunohistochemistry (IHC) were reviewed. RESULTS Four SFTs were identified from four patients with a median age of 59 years. The morphological features were variable but most frequently showed a bland spindled-to-epithelioid proliferation in fragments and single cells with small, oval, elongated, and hypochromatic nuclei in a haphazard arrangement with or without dense collagen. One tumour presented with a concurrent metastasis and showed a pure epithelioid component with necrosis and enlarged, hyperchromatic nuclei with conspicuous nucleoli and scattered mitoses. IHC was necessary for all diagnoses which were confirmed by surgical resection. CONCLUSIONS SFTs with pancreatic involvement are rare, and non-specific features and tumour heterogeneity can pose a diagnostic challenge on FNA; however, IHC can be used to make a definitive diagnosis. As a result, FNA is a simple, safe, cost-effective, and accurate approach that can be used to diagnose SFT in the pancreas.
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Affiliation(s)
- Victoria M Jones
- Department of Pathology & Laboratory Medicine, University of Kentucky College of Medicine, Lexington, KY, USA
| | | | - Virgilius Cornea
- Department of Pathology & Laboratory Medicine, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Therese J Bocklage
- Department of Pathology & Laboratory Medicine, University of Kentucky College of Medicine, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - Syed Z Ali
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Derek B Allison
- Department of Pathology & Laboratory Medicine, University of Kentucky College of Medicine, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
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